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/ansible/roles/appnode/files/oozie_server/oozie/oozie-server/webapps/oozie/docs/core/apidocs/src-html/org/apache/oozie/servlet/HostnameFilter.html

https://gitlab.com/wardcomm/code_examples
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  1. <HTML>
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  2. <BODY BGCOLOR="white">
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  3. <PRE>
    4. 

  4. <FONT color="green">001</FONT>    /**<a name="line.1"></a>
    5. 

  5. <FONT color="green">002</FONT>     * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a>
    6. 

  6. <FONT color="green">003</FONT>     * or more contributor license agreements.  See the NOTICE file<a name="line.3"></a>
    7. 

  7. <FONT color="green">004</FONT>     * distributed with this work for additional information<a name="line.4"></a>
    8. 

  8. <FONT color="green">005</FONT>     * regarding copyright ownership.  The ASF licenses this file<a name="line.5"></a>
    9. 

  9. <FONT color="green">006</FONT>     * to you under the Apache License, Version 2.0 (the<a name="line.6"></a>
    10. 

  10. <FONT color="green">007</FONT>     * "License"); you may not use this file except in compliance<a name="line.7"></a>
    11. 

  11. <FONT color="green">008</FONT>     * with the License.  You may obtain a copy of the License at<a name="line.8"></a>
    12. 

  12. <FONT color="green">009</FONT>     *<a name="line.9"></a>
    13. 

  13. <FONT color="green">010</FONT>     *     http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a>
    14. 

  14. <FONT color="green">011</FONT>     *<a name="line.11"></a>
    15. 

  15. <FONT color="green">012</FONT>     * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a>
    16. 

  16. <FONT color="green">013</FONT>     * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a>
    17. 

  17. <FONT color="green">014</FONT>     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a>
    18. 

  18. <FONT color="green">015</FONT>     * See the License for the specific language governing permissions and<a name="line.15"></a>
    19. 

  19. <FONT color="green">016</FONT>     * limitations under the License.<a name="line.16"></a>
    20. 

  20. <FONT color="green">017</FONT>     */<a name="line.17"></a>
    21. 

  21. <FONT color="green">018</FONT>    <a name="line.18"></a>
    22. 

  22. <FONT color="green">019</FONT>    package org.apache.oozie.servlet;<a name="line.19"></a>
    23. 

  23. <FONT color="green">020</FONT>    <a name="line.20"></a>
    24. 

  24. <FONT color="green">021</FONT>    import org.apache.oozie.util.XLog;<a name="line.21"></a>
    25. 

  25. <FONT color="green">022</FONT>    <a name="line.22"></a>
    26. 

  26. <FONT color="green">023</FONT>    import javax.servlet.Filter;<a name="line.23"></a>
    27. 

  27. <FONT color="green">024</FONT>    import javax.servlet.FilterChain;<a name="line.24"></a>
    28. 

  28. <FONT color="green">025</FONT>    import javax.servlet.FilterConfig;<a name="line.25"></a>
    29. 

  29. <FONT color="green">026</FONT>    import javax.servlet.ServletException;<a name="line.26"></a>
    30. 

  30. <FONT color="green">027</FONT>    import javax.servlet.ServletRequest;<a name="line.27"></a>
    31. 

  31. <FONT color="green">028</FONT>    import javax.servlet.ServletResponse;<a name="line.28"></a>
    32. 

  32. <FONT color="green">029</FONT>    import java.io.IOException;<a name="line.29"></a>
    33. 

  33. <FONT color="green">030</FONT>    import java.net.InetAddress;<a name="line.30"></a>
    34. 

  34. <FONT color="green">031</FONT>    import java.net.UnknownHostException;<a name="line.31"></a>
    35. 

  35. <FONT color="green">032</FONT>    <a name="line.32"></a>
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  36. <FONT color="green">033</FONT>    /**<a name="line.33"></a>
    37. 

  37. <FONT color="green">034</FONT>     * Filter that resolves the requester hostname.<a name="line.34"></a>
    38. 

  38. <FONT color="green">035</FONT>     */<a name="line.35"></a>
    39. 

  39. <FONT color="green">036</FONT>    public class HostnameFilter implements Filter {<a name="line.36"></a>
    40. 

  40. <FONT color="green">037</FONT>        private static final XLog LOG = XLog.getLog(HostnameFilter.class);<a name="line.37"></a>
    41. 

  41. <FONT color="green">038</FONT>    <a name="line.38"></a>
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  42. <FONT color="green">039</FONT>        static final ThreadLocal&lt;String&gt; HOSTNAME_TL = new ThreadLocal&lt;String&gt;();<a name="line.39"></a>
    43. 

  43. <FONT color="green">040</FONT>    <a name="line.40"></a>
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  44. <FONT color="green">041</FONT>        /**<a name="line.41"></a>
    45. 

  45. <FONT color="green">042</FONT>         * Initializes the filter.<a name="line.42"></a>
    46. 

  46. <FONT color="green">043</FONT>         * &lt;p/&gt;<a name="line.43"></a>
    47. 

  47. <FONT color="green">044</FONT>         * This implementation is a NOP.<a name="line.44"></a>
    48. 

  48. <FONT color="green">045</FONT>         *<a name="line.45"></a>
    49. 

  49. <FONT color="green">046</FONT>         * @param config filter configuration.<a name="line.46"></a>
    50. 

  50. <FONT color="green">047</FONT>         *<a name="line.47"></a>
    51. 

  51. <FONT color="green">048</FONT>         * @throws ServletException thrown if the filter could not be initialized.<a name="line.48"></a>
    52. 

  52. <FONT color="green">049</FONT>         */<a name="line.49"></a>
    53. 

  53. <FONT color="green">050</FONT>        @Override<a name="line.50"></a>
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  54. <FONT color="green">051</FONT>        public void init(FilterConfig config) throws ServletException {<a name="line.51"></a>
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  55. <FONT color="green">052</FONT>        }<a name="line.52"></a>
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  56. <FONT color="green">053</FONT>    <a name="line.53"></a>
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  57. <FONT color="green">054</FONT>        /**<a name="line.54"></a>
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  58. <FONT color="green">055</FONT>         * Resolves the requester hostname and delegates the request to the chain.<a name="line.55"></a>
    59. 

  59. <FONT color="green">056</FONT>         * &lt;p/&gt;<a name="line.56"></a>
    60. 

  60. <FONT color="green">057</FONT>         * The requester hostname is available via the {@link #get} method.<a name="line.57"></a>
    61. 

  61. <FONT color="green">058</FONT>         *<a name="line.58"></a>
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  62. <FONT color="green">059</FONT>         * @param request servlet request.<a name="line.59"></a>
    63. 

  63. <FONT color="green">060</FONT>         * @param response servlet response.<a name="line.60"></a>
    64. 

  64. <FONT color="green">061</FONT>         * @param chain filter chain.<a name="line.61"></a>
    65. 

  65. <FONT color="green">062</FONT>         *<a name="line.62"></a>
    66. 

  66. <FONT color="green">063</FONT>         * @throws IOException thrown if an IO error occurrs.<a name="line.63"></a>
    67. 

  67. <FONT color="green">064</FONT>         * @throws ServletException thrown if a servet error occurrs.<a name="line.64"></a>
    68. 

  68. <FONT color="green">065</FONT>         */<a name="line.65"></a>
    69. 

  69. <FONT color="green">066</FONT>        @Override<a name="line.66"></a>
    70. 

  70. <FONT color="green">067</FONT>        public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)<a name="line.67"></a>
    71. 

  71. <FONT color="green">068</FONT>            throws IOException, ServletException {<a name="line.68"></a>
    72. 

  72. <FONT color="green">069</FONT>            try {<a name="line.69"></a>
    73. 

  73. <FONT color="green">070</FONT>                String hostname;<a name="line.70"></a>
    74. 

  74. <FONT color="green">071</FONT>                try {<a name="line.71"></a>
    75. 

  75. <FONT color="green">072</FONT>                    String address = request.getRemoteAddr();<a name="line.72"></a>
    76. 

  76. <FONT color="green">073</FONT>                    if (address != null) {<a name="line.73"></a>
    77. 

  77. <FONT color="green">074</FONT>                        hostname = InetAddress.getByName(address).getCanonicalHostName();<a name="line.74"></a>
    78. 

  78. <FONT color="green">075</FONT>                    } else {<a name="line.75"></a>
    79. 

  79. <FONT color="green">076</FONT>                        LOG.warn("Request remote address is NULL");<a name="line.76"></a>
    80. 

  80. <FONT color="green">077</FONT>                        hostname = "???";<a name="line.77"></a>
    81. 

  81. <FONT color="green">078</FONT>                    }<a name="line.78"></a>
    82. 

  82. <FONT color="green">079</FONT>                } catch (UnknownHostException ex) {<a name="line.79"></a>
    83. 

  83. <FONT color="green">080</FONT>                    LOG.warn("Request remote address could not be resolved, {0}", ex.toString(), ex);<a name="line.80"></a>
    84. 

  84. <FONT color="green">081</FONT>                    hostname = "???";<a name="line.81"></a>
    85. 

  85. <FONT color="green">082</FONT>                }<a name="line.82"></a>
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  86. <FONT color="green">083</FONT>                HOSTNAME_TL.set(hostname);<a name="line.83"></a>
    87. 

  87. <FONT color="green">084</FONT>                chain.doFilter(request, response);<a name="line.84"></a>
    88. 

  88. <FONT color="green">085</FONT>            }<a name="line.85"></a>
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  89. <FONT color="green">086</FONT>            finally {<a name="line.86"></a>
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  90. <FONT color="green">087</FONT>                HOSTNAME_TL.remove();<a name="line.87"></a>
    91. 

  91. <FONT color="green">088</FONT>            }<a name="line.88"></a>
    92. 

  92. <FONT color="green">089</FONT>        }<a name="line.89"></a>
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  93. <FONT color="green">090</FONT>    <a name="line.90"></a>
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  94. <FONT color="green">091</FONT>        /**<a name="line.91"></a>
    95. 

  95. <FONT color="green">092</FONT>         * Returns the requester hostname.<a name="line.92"></a>
    96. 

  96. <FONT color="green">093</FONT>         *<a name="line.93"></a>
    97. 

  97. <FONT color="green">094</FONT>         * @return the requester hostname.<a name="line.94"></a>
    98. 

  98. <FONT color="green">095</FONT>         */<a name="line.95"></a>
    99. 

  99. <FONT color="green">096</FONT>        public static String get() {<a name="line.96"></a>
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  100. <FONT color="green">097</FONT>            return HOSTNAME_TL.get();<a name="line.97"></a>
    101. 

  101. <FONT color="green">098</FONT>        }<a name="line.98"></a>
    102. 

  102. <FONT color="green">099</FONT>    <a name="line.99"></a>
    103. 

  103. <FONT color="green">100</FONT>        /**<a name="line.100"></a>
    104. 

  104. <FONT color="green">101</FONT>         * Destroys the filter.<a name="line.101"></a>
    105. 

  105. <FONT color="green">102</FONT>         * &lt;p/&gt;<a name="line.102"></a>
    106. 

  106. <FONT color="green">103</FONT>         * This implementation is a NOP.<a name="line.103"></a>
    107. 

  107. <FONT color="green">104</FONT>         */<a name="line.104"></a>
    108. 

  108. <FONT color="green">105</FONT>        @Override<a name="line.105"></a>
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  109. <FONT color="green">106</FONT>        public void destroy() {<a name="line.106"></a>
    110. 

  110. <FONT color="green">107</FONT>        }<a name="line.107"></a>
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  172. </PRE>
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  173. </BODY>
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  174. </HTML>
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